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Concordance of the point-of-care circulating cathodic antigen test for the diagnosis of intestinal schistosomiasis in a low endemicity area

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Infectious Diseases of Poverty 2019年第3期8卷 99-100页

作者： Sergei Rodrigo Magalhaes de Sousa Isabelle Helena Lima Dias Alvaro Luan Santana Fonseca Bianca Rodrigues Contente Joyce Favacho Cardoso Nogueira Tatyellen natasha da Costa Oliveira Stefan Michael Geiger Martin Johannes Enk programa de pos-graduacao Strictu Sensu em biologia parasitaria na amazonia da Universidade do Estado do Para Tv.Perebebui2623-MarcoBelemPA 66087Brazil Laboratorio de Parasitoses Intestinais Esquistossomose e Malacologia(LPIEM)Secgao de ParasitologiaInstituto Evandro Chagas/SVS/MSAnanindeuaParaBrazil

Background:The Kato-Katz technique is recommended worldwide for the diagnosis of intestinal schistosomiasis,detecting parasite eggs in feces of infected ***,new tests have been developed in order to facilitate diagnosis,*** detection of specific antigens secreted by schistosomes,such as the circulating cathodic antigen(CCA).The aim of this study was to evaluate the performance of the point-of-care circulating cathodic antigen test(POC-CCA)compared to the Kato-Katz technique in a low prevalence area in the Amazon Region,located in the municipality of Primavera,State of Para,***:positivity rates of the POC-CCA test and the Kato-Katz technique were *** sensitivity,specificity,accuracy and kappa coefficient were determined by comparing both *** reference standard was established using 16 Kato-Katz slides,12 of the first fecal sample,two of the second and two of the third *** study also included the concordance between POC-CCA results and different numbers and combinations of Kato-Katz ***:The prevalence of schistosomiasis according to the reference standard or POC-CCA test reached a rate of 9.4%or 23.9%,respectively,among a total of 372 *** positivity rates by the Kato-Katz technique increased from 2.4 to 9.4%,according to the increase in the number of slides examined and fecal samples colleaed.A sensitivity of 55.6%,specificity 76.9%,accuracy 76%and k coefficient of 0.06 was observed by comparing one slide of the first sample and *** 6 slides from three different samples,two slides of each,with POC-CCA resulted in a sensitivity of 583%,specificity 78.4%,accuracy 77%and k coefficient of ***,the comparison of 16 slides from three different samples with POC-CCA revealed a sensitivity of 65.7%,specificity 80.4%,accuracy 79%,and k coefficient of ***:The immunochromatographic test has the potential to be an important tool to combat schistosomiasis because of its practi

关键词： Schistosoma mansoni Kato-Katz POC-CCA Accuracy Diagnosis Low prevalence area

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Schistosomiasis Mansoni in the Amazon Region:Malacological Surveys of Intermediate Hosts for the Identification of Disease Transmission Areas in Belem,Para,Brazil

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Journal of Pharmacy and Pharmacology 2019年第2期7卷 51-60页

作者： Christiane de Oliveira Goveia Ricardo Jose de Paula Souza e Guimaraes Marcio Roberto Teixeira Nunes Isabelle Helena Lima Dias Martin Johannes Enk Instituto Evandro Chagas Secretaria de Vigilancia em SaudeMinisterio da Saude-IEC/SVS/MS-Secao de ParasitologiaLaboratario de Parasitoses IntestinaisEsquistossomose e MalacologiaAnanindeuaParaBrasil programa de pos-graduacao em biologia parasitaria na amazonia Universidade do Estado do Para-UEPABelemParaBrasil Instituto Evandro Chagas Secretaria de Vigilancia em SaudeMinisterio da SaudeLaboratorio de Geoprocessamento-LABGEO/IEC/SVS/MSAnanindeuaParaBrasil Instituto Evandro Chagas Secretaria de Vigilancia em SaudeMinisterio da SaudeCentro de Inovacoes Tecnologicas-CIT/IEC/SVS/MSAnanindeuaParaBrasil

In Brazil,schistosomiasis occurrence is related to the presence of the etiological agent Schistosoma *** presence of mollusks for Biomphalaria genus is a necessary condition for development of the parasite *** Parástate,the species ***,***,*** and *** have already been identified,with reports of the last two occurring in Belé*** aim of this study was to determine the spatial distribution of Biomphalaria species in Belém,Pará,Brazil,identifying risk areas for schistosomiasis *** malacological surveys were carried out between September 2013 and October 2017 in 35 neighborhoods of Belé*** collection points were georeferenced using a Global positioning System(GPS)receiver and the Kernel density Estimation(Kde)was used to the spatial *** mollusks,after measurement,were exposed to light to verify the presence of *** ***,mollusks were sacrificed and fixed for dissection and morphological identification of *** surveys resulted in a total of 10,803 mollusks collected,of which 9,367(86.70%)specimens were *** the analyzed mollusks,5,820(62.14%)were identified as *** and 3,547(37.86%)as *** presence of the parasite was observed in 208(2.22%)specimens,all *** mollusks were found in six neighborhoods:Guamá(51 mollusks/24.5%),Sacramenta(47 mollusks/22.6%),Telégrafo(47 mollusks/22.6%),Terra Firme(36 mollusks/17.3%),Condor(20 mollusks/9.6%)and Barreiro(7 mollusks/3.4%).This study confirms that *** species actively participates as intermediate host in the disease maintenance in Belé*** Kde allowed to analyze the spatial distribution of collection sites and consequently to determine possible risk areas of schistosomiasis transmission in *** development of maps identifying sites with schistosomiasis positive snails may support efforts of this municipality by directing activities related to endemic disease control.

关键词： Biomphalaria spp. Schistosoma mansoni intermediate hosts schistosomiasis spatial analysis

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